Process and machine for making fuses



Dec. 1924- 1,517,878

F. WASMAYR PROCESS AND MACHINE FOR MAKING FUSES Filed Jan. 16, 1923 2,4 Mau -gm].

Patented Dec. 2,1924.

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Application filed January 18, 1923. Serial No. 813,071.

To all whom it may concern: I

Be it known" that I, FRANZ WASMAYR,

residing at Wr. Neustadt, Austria, have in-. vented a certain new and useful Processand Machine for Making Fuses, of which the following is a specification.

My invention relates to a process of, and a machine for, manufacturing fuses. Fuses have heretofore been manufactured by feeding a strip of paper in a horizontal direction, and feeding the powder to itfrom a hopper, the edges of the'strip being bent towards each other to form a tube, which is spun over with yarn. In manufacturing this kind of fuses it is exceedingly difiicult to distribute the charge quite uniformly. In consequence of this gaps in the powdercore occasionally occur, which lead to unequal combustion and miss-fires. Besides this a comparatively large quantity of yarn is necessary to form a perfectly tight wrapper over the powdercore. Such fuses have also the disadvantage that they break when bent.

According to my invention these disadvantages are avoided.

The process which I adopt consists in forming a tube of a strip of paper, fed in a vertical direction, and causing a stream of :powder running in the same direction to 'sink'into this tube in the course of its production. The tube is spun over helically with thread or yarn, directly after the coilin of the paper into the tubular shape.

I his process of manufacture has the advantageeofsecuring completely uniform distributron of the charge, asthe powder-column is surrounded by the. apenstrip when P it leaves the funnel in w ich the tube 'is found.

Unequal combustion and miss-fires are thus avoided and the quantity of powder can moreover be considerably reduced, without impairing in the least the effect. The spilling of powder on the machine is also prevented so, that the danger of fire is greatdiminished and the work is neater. By

surrounding the powder-core by a papertube one can also obtain the desired result with a smaller quantity of yarn. While up to now ten yarn threads were required for wrapping up completely the powder-core,

- only eight threads are needed, with the new process.

A machine for carrying into eifectthe process according to my invention 1s illustrated in Figures 24 funnel.

Fig. 2 shows a vertical section and the Figures Sand 4 are cross-sections according to line A- -B and line CD of Fig.2. The machine'comprisesa powderhopper 4 from the bottom of which leads a dis o f 'th e drawing, and

charge tube 6 controlled by a cock 5.v Within the tube G'there is a telescopically slidable tube 7 held in position'by a spring8, which is fixed to the tube 6 andbears against the wall of the tube 7.

Under the feeding tube is a'funnel 9,

into which a small filler tube 10 is inserted.

This is provided with a channel 11 for con-' ducting the paper-strips into the funnel. This funnel is fitted into a short tube or socket 12, which has channels 13 for guidini'the threads.v The tube 12 is carried by a racket 14 on a spinning plate 15. On the plate 15 are two superposed spoolholders 17, 18 resting on pillars 16. One of these spool-holders 17 has six yarn-spools 19 and the other 18 has two yarn-spools 20 and two paper-spools 21. Only one of the paper-spools is put in use while the other is kept in reserve.

From one of the spools 21 the paper-strip is conducted through the channel 11 into the funnel 9 and guided on its inner surface. When the spinning-plate revolves the paper-strip is wound around the powdercore, before it is accessible to the threads as these threads are conducted through the channels 13 to the cord formed by the paperstrip and do not reach it till it has left the The adjustability of the tube 7 enables it' to be accurately set for feeding the owder to the filler tube and also enables the latter to be inserted into the funnel.

'The're may be a plurality. of channels 11,

for 'lapping with two or more strips.

What I claim is:

1. The process of'manufacturing a fuse, which consists in forming a vertical tube by helically coiling a strip of paper, causing a vertical stream of powder to-sink into'this tube concurrently with the coiling of the paper, andspinning filament round the tube concurrently with the coiling and directly below the part last coiled.

2. In a fuse making machine'the combination of a funnel, a filler tube within the wider part of said funnel, there being a clearance between said tube and the inner surface of the funnel, means for feeding combustible powder through said filler tube into the funnel, means for feeding a strip of fabric between'fs aid surface of said funnel, and lappi'ng said stripround the powder issuin vfrom said 'tube and means for-spinningt readiround the lapped strip offabric; I I 3; In a fuse making machine the com binetion of a funne1,'a'fil1erti1be within the I Wider part of said funnel, there being a clearance between suid tube and the inner. Surface of the funnel, means 'forifeeding' combustible powdefthrough' said filler tube into the funnel, means for feeding'a strip of fabric between said tube and: the inner, and lap ingrsaidsurface of said funnel; strip round the powder tube, a socket embracing issuing tom said said funnel and having channels fergulding threads, and

means for feeding thread through .said chem nels,

lapped fabricissuing from said funnel. 7

tube :and the inner: p

socket; 'a filler tube within the wider part and spinning said threads round the I 4. In a. fuse making machinethe combimi-- tion of asocket, a removable funnel in said 'of said funnel, there being a clearance be tween said tube and the mnersurface of the funnel; neansgfcr feeding combustible a ri'cQ- specification in the presence of two witnesses. v

' -Witnesses V Joan? KUTseHERe, HANS PAPPENHEIL Inewitness whereof 'I heveysigned this,

'WASMAYR, FRANZ.-

"powder-through said filler tube into the y from said tube,. and meens, read round the lapped strip 

